Means for facilitating doffing in flyer spinning, twisting, and similar machines



Sept. 29,1931. w. PRINCE-SMITH ET AL 1,825,301

MEANS FOR FACILITATING DOEFING IN FLYER SPINNING,

TWISTING, AND SIMILAR MACHINES Filed Nov 8, 1950 5 Sheets-Sheet 1 Fig. 1.

IL MVLW70R5 p 1931- w PRINCE-SMITH ET AL 1,825,201

MEANS FOR FACILITATING DOFFING IN FLYER SPINNING,

TWISTING, AND SIMILAR MACHINES il 1930 3 Sheets-Sheet 2 '/NVENTOR3;-

RT TOR/V5 Y 6-5018]: M flaDigWr wuse.

Sept-.29; 1931.

W. PRINCE-SMITH ET AL MEANS FOR FACILITATING DOFFING IN FLYER SPINNING, TWISTING, AND SIMILAR MACHINES Filed NOV. 8, 1930 3 Sheets-Sheet 3 IN VE NTO/id WaZr/wwe.

ATTORNEY? Patented Sept. 29, 1931 WILLIAM PR-iNGE-SMITH AND DAVID WATERHOUSE, OF KE IGHLEY, ENGLAND MEANS non FACILITATING DOFFING IN FLYERV snmnmo, MACHINES Application filed November 8, 1930, Serial No. 494,424, and in Great Britain December 7, 1929. V

This invention relates to flyer spinning, twisting, and similar machines provided with mechanical dofling apparatus and of the type having means for the purpose of aligning the flyers in a plane parallel with the machine prior to the dotting operation, and having also a series of angularly movableprongs adapted to control the threads during the manipulation of the full bobbins when doffing; the invention having for its objects to secure a better control of the threads during dotting, and to facilitate and expedite the doffing operation. 1 7

Accordingly, a fiyer spinning, twisting or similar machine of the type referred to is provided, in rear of the flyers, with a series of angularly movable wipers or prongs adapted to engage and retain the threads and to func tion in association with thread severing means as well as with thread; guiding and controlling means to cause the severed threads to be correctly wrapped on the'empty bobbins when exchanged for the full bobbins by appropriate bobbin manipulating mechanism. V T

The aforesaid wipers or prongs may 'consist of pairs of hook-ended rigid wires carried by an angularly movable rod, the'hooked ends of each pair being capable of entering between the legs of the correspondingly opposite flyer; and upon each wire there may be mounted slidably a weight or equivalent member adapted to be displaced by gravity or otherwisesuitably whereby to trap and nip a thread in the appropriate hooked end Wherein it may be caught when said wipers or prongs are moved angularly through the flyers at a particular stage of the dofling operation. V

The thread-severing means, across which said wipers or prongs are adapted to lay the threads, may be ofany convenient form, and, after saidthread-severing. means have been caused to operate. the severed endsof the threads are nippedby said wipers or prongs while the aforesaid thread guiding and controlling means are operated.

The guiding and controlling of the severed ends of the threads may be accomplished by means of a continuoushorizontal rail located.

TWISTING, AND SIMILAR between the aforesaid angularlymova-blerod and the fiyers, in conjunction with'which a vertically movable horizontal continuous rod is adapted to be operated in such manner as tobear upon the severed threads behind and adjacent to those flyer eyes throughvwhich they pass while the empty bobbins are being positioned relatively to the fiyers and to put tension in and so ensure that the loose ends of the severed threads are correctlylaid onto ing-on to be effected, and theaforesaid hori- -zontal rail and vertically movable horizontal rod servingto dispose of the loose ends once the thread has become attached to eachempty bobbin.

pied by the parts throughout the doffing operation. Figure 5 is a plan view and Figure The invention is illustrated, ofeX- ample, in the accompanying drawings, in

said emptvbobbins when the frame is re- 6 is a. front elevation of a wiper or thread retaining means. i In these figures the generalconstructional features of the machine are already known andtherefore do not require'specificdescription, in fact structurally the machine resembles closely that described inspecificationlof UnitedSt-ates Patent No. 1,543,618. y Figure 1 shows the position of all the parts .during spinning, a series of bobbinshaving just become filledwith the correct amount of thread.

-. The flyers are first of all positioned, as seen in Figure 2, in a plane parallel with the machine. The full bobbins are then lowered on to the appropriatetransfer rail the pegs on which have been aligned below the spindles, in the manner described in Unitedstates specification No. ].;543.618, in which position he threads will stretch vertically from the fiver eyes to the full-bobbins and some may also have become wrapped more or less round the spindles. xv

a are the'spindles, upon which are secured the fiyers b in the usual vmanner, and 'c'and d are the full and empty bobbins respectively, while 6 is a longitudinally slidable rod carrying forwardly projecting pins f adapted to contact with and straighten the flyers b, g is the fixed overhead rail in which the flyers b are supported in the known way.

h is the pinion shaft for raising and lowering the rail C and is the pinion shaft for moving the-rack bars horizontally-towards and from the spindles; said rack bars is supporting cranked'bracketsl supporting two rows of transfer pegs m, m, projectingvertically upwards from peg rails n, it, carried by said cranked brackets Z.

All said parts are known as to their construction and operation.

o'is a rod arranged longitudinally of the machine, insuitable bearings,.in rear of the spindles and capable of being moved angularly by means of a hand-piece or hand-wheel (notshown) Behind each spindle a a boss or sleeve 0 is secured bya set screw 0 upon the rod 0 and each boss or sleeve 0 is formed integrally with a rearwardly projecting arm 0 in which is mounted alpair of hook-ended rigid wires 79, p, whereof the inner ends are screw-threaded and are secured by clamping nuts p, p, in the arm 0?.

The forward endsof said wires p, p, are hook-shaped, as at 79 79 and each pair of wiresp, 70, issospaced as to'be capable of entering between the legs of the correspondingly opposite flyer b.

Upon each wire 79 a weight 20* is mounted slidably.

q, q, qis a thread cutter bar of known form. and r is a continuous rod which is supported on the rail C by a number of upstanding slotted brackets r.

s is a continuous rail attached to and carried. by aforwardly extending arm 8 formed integrally with each boss or sleeve 0 mounted on the angularly movable rod 0.

After the bobbins 0 have been filled with the .requiredamount of thread, the parts being as positioned in Figure 1, the flyers 7) are straightened by rod 0 and pins f, the rail C isthen lowered'by turning pinion shaft h, and when railC reaches its lowermost position, as' in Figure 2, the pinion shaft 7' is rotated to cause the rack bars 70 to position the cranked brackets Zso that the transfer pegs m are axially below the spindles a.

The pokers E and lifter rail D are then lowered until the full bobbins c are passed over {thetransferpegs m and rest on the transfer ,rail n. The threads T will then stretch vertically from the eye of each flyer to each full bobbin 0 and some may perhaps ,also be wrapped slightly round some of the spindles a.

The nextoperation is to move the rod 0 .angularly in a counter-clockwise direction through 360 degrees so that the hook-ended wires or wipers p sweep through the legs of all the flyers b.

As the wipers p move upwards the slidable weights 12 fall by gravity away from the books 19' leaving the latter free, as they pass between the fiyer legs, to catch the threads T which are-then carried by the wipers 2) across the cutter bar q, and as the wipers p re-assunie their vertically downwards position the weights slide down to the hooks p and nip the threads therein. The path of the thread T at this stage is clearly seen in Figure 2.

The threads are then severed by operating the cutter mechanism Q, 9, which leaves the threads as shown in Figure 8, that is to say, with each severed end of thread held by a weight 10 on one or other limb p of each wiper; and the empty bobbins (Z are then aligned below the spindles a by means of pin ion shaft 7' and rack bars 70 also as shown in Figure 4.

The lifter rail D is now caused to position the emptyl'iobbins (Z on the spindles a, and at the same time rod r is elevated into the po sition shown in Figure 4 and is brought into contact with the rail 8 (which is stationary at this stage) for the purpose of tensioniug the threads after leaving the hooked ends of the wipers. The cranked brackets Z are moved outwards to the full extent and the tlyer straighteners e and 7 are withdrawn whereupon the machine is ready for re-starting.

As soon as the flyers start rotating the threads are under tension between the fiyer eyes and the weights 7), which, as the threads slip away from under the weights, causes the threads to wrap around the empty bobbins, the contacting rod 4 and rail .9 putting tension upon and so ensuring that the loose ends are correctly disposed of.

i ,The threads are therefore cleared from the spindles, caught and'held in tension whilst they are being severed, the severed ends of:

'tlie threads being subsequently held in tension, causing the fly'ers to start wrapping thread on to the empty bobbins. The severed threads are guided correctly on to the empty bobbins and at the same time held in tension which ensures that the loose ends are dis posed of correctly by being wrapped on to the bobbin, the threads being severed whilst the machine is stationary. with the result that a superior control of the thread is obtained, loose ends disposed of, and doiling is simplified and expedited.

lVhat we claim is 1. In a flyer-spinning, twisting and similar machine provided with mechanical dotfing apparatus, spindles, flyers mounted on said spindles. bobbins on said spindles. threads passing through said tlyers and woun d on said bobbins on said spindles. transfer pegs, empty bobbins on some of said transfer pegs. thread severing means, a series of angularly movable members located in rear of said spindles,

means to move said angularly movable members into the paths if said threads extending from said flyers to said bobbins on said spindles, means carried by said 7 angularly movable members to seize said threads when said bobbins have been transferred by said mechanical doffing apparatus to some of said transfer pegs, said means on said angularly movable members also serving to retain the ends of said threads passing through said flyers after severance by said thread severing means, and means to tension said ends of said threads upon their release from said retaining means on said angularly movable members.

2. In a flyer-spinning, twisting and similar machine provided with mechanical dofiing apparatus, spindles, flyers mounted on said spindles, bobbins on said spindles, threads passing through said flyers and wound on said bobbins on said spindles, transfer pegs, empty bobbins on some of said transfer pegs, thread severing means, a series of angularly movable members located in rear of said spindles, said angularly movable member's consisting of pairs of hook-ended rigid wires, means to move said angularly movable members into the paths of said threads extending from said flyers to said bobbins on said spindles, means carried by said angularly movable members to seize said threads when said bobbins have been transferred by said mechanical dofiing apparatus to some of said transfer pegs, said means on said angularly movable members also serving to retain the ends of said threads passing through said flyers after severance by said thread severing means, and means to tension said ends of said threads upon their release from said retain- Egg means on said angularly movable mem- 3. In a flyer-spinning, twisting and similar machine provided with mechanical dofi'mg apparatus, spindles, flyers mounted on said spindles, bobbins on said spindles, threads passing through said flyers and wound on said bobbins on said spidles, transfer pegs, empty bobbins on some of said transfer pegs, thread severing means, a series of angularly movable members located in rear of said spindles, said angularly movable members consisting of pairs of hook-ended rigid wires, means to move said angularly movable members into the paths of said threads extending from said flyers to said bobbins on said spindles, members carried slidably by said angularly movable members to seize said threads when said bobbins have been transferred by said mechanical dofling apparatus to some of said transfer pegs, said means on said angularly movable members also serving to retain the ends of said threads passing through said flyers after severance by said thread severing means, and means to tension said ends of said threads upon their release from said retaining means on said angularly movable members.

4. In a flyer-spinning, twisting and similar machine provided with mechanical dotting apparatus, spindles, flyers mounted on said spindles, bobbins on said spindles, threads passing through said flyers and wound on said bobbins on said spindles, transfer pegs, empty bobbins on some of said transfer pegs, thread severing means, a series of angularly movable members located in rear of said spindles, said angularly movable members consisting of pairs of hook-ended rigid wires, means to move said angularly movable members into the paths of said threads extending from said flyers to said bobbins on said spindles, gravity operated members carried slidably by said angularly movable members to seize said threads when said bobbins have been transferred by said mechanical dofiing apparatus to some of said transfer pegs, said means on said angularly movable members also serving to retain the ends of said threads passing through said flyers after severance by said thread severing means, and means to tension said ends of said threads upon their release from said retaining means on said angularly movable members.

5. In a flyer-spinning, twisting and similar machine provided with mechanical dofiing mechanism and having spindles carrying flyers, a pair of angularly movable hookended rigid wires located in rear of each of said spindles, a gravity-operated sliding weight upon each of said wires, and means to move said wires angularly towards said spindles.

In testimony whereof they afiix their signatures.

WILLIAM PRINCE-SMITH. DAVID WATERHOUSE. 

